/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef PINYINIME_INCLUDE_SYNC_H__
#define PINYINIME_INCLUDE_SYNC_H__

#define ___SYNC_ENABLED___

#ifdef ___SYNC_ENABLED___

#include "userdict.h"
#include <QString>


namespace ime_pinyin
{

	// Class for user dictionary synchronization
	// This class is not thread safe
	// Normal invoking flow will be
	//   begin() ->
	//   put_lemmas() x N ->
	//   {
	//     get_lemmas() ->
	//     [ get_last_got_count() ] ->
	//     clear_last_got() ->
	//   } x N ->
	//   finish()
	class Sync
	{
	public:
		Sync();
		~Sync();

		static const int kUserDictMaxLemmaCount = 5000;
		static const int kUserDictMaxLemmaSize = 200000;
		static const int kUserDictRatio = 20;

		bool begin(const char *filename);

		// Merge lemmas downloaded from sync server into local dictionary
		// lemmas, lemmas string encoded in UTF16LE
		// len, length of lemmas string
		// Return how many lemmas merged successfully
		int put_lemmas(char16 *lemmas, int len);

		// Get local new user lemmas into UTF16LE string
		// str, buffer ptr to store new user lemmas
		// size, size of buffer
		// Return length of returned buffer in measure of UTF16LE
		int get_lemmas(char16 *str, int size);

		// Return lemmas count in last get_lemmas()
		int get_last_got_count();

		// Return total lemmas count need get_lemmas()
		int get_total_count();

		// Clear lemmas got by recent get_lemmas()
		void clear_last_got();

		void finish();

		int get_capacity();

	private:
		UserDict *userdict_;
        char *dictfile_;
       // QString dictfile_;
		int last_count_;
	};

}

#endif

#endif  // PINYINIME_INCLUDE_SYNC_H__
